Format the input string:
<?php
function ucsentences($string){
$parts = preg_split('/([^\.\!\?;]+[\.\!\?;"]+)/', strtolower($string), (-1), PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);
$r = '';
foreach($parts as $key=>$sentence){
$r .= ucfirst(trim($sentence)) . ' ';
}
$r = preg_replace('/\bi\b/', 'I', $r);
$r = preg_replace_callback('/("[a-z])/', function($m){ return strtoupper($m[0]);}, $r);
return rtrim($r);
}
$str = 'i\'m not sure. if this is good enough, but i thought: "hey, who know\'s. maybe i am right."';
?>
Outputs:
I'm not sure. If this is good enough, but I thought: "Hey, who know's. Maybe I am right."
